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Instanton induced quark dynamics and the pentaquark

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dc.contributor.author	Kochelev, Nikolai
dc.contributor.author	Lee, Hee-Jung
dc.contributor.author	Vento Torres, Vicente
dc.date.accessioned	2015-05-12T10:53:29Z
dc.date.available	2015-05-12T10:53:29Z
dc.date.issued	2004
dc.identifier.citation	Kochelev, Nikolai Lee, Hee-Jung Vento Torres, Vicente 2004 Instanton induced quark dynamics and the pentaquark Physics Letters B 594 1-2 87 96
dc.identifier.uri	http://hdl.handle.net/10550/43731
dc.description.abstract	We analyze the existence of the exotic Θ+ from the perspective of instanton induced quark dynamics. The 't Hooft interaction gives strong attraction in specific channels of the triquark uds¯ and diquark ud configurations. In particular it leads to a light uds¯ triquark cluster, with the mass around 750MeV, in the I=0, S=1/2 and color 3 configuration, and a light ud-diquark configuration, with mass 440MeV, in the I=0, S=0 and color {3¯} configuration. If we consider the pentaquark as a bound state of such triquark and diquark configurations in a relative L=1 state we obtain good agreement with the data. The small width of Θ+ has a natural explanation in this model.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 2004, vol. 594, num. 1-2, p. 87-96
dc.subject	Física
dc.title	Instanton induced quark dynamics and the pentaquark
dc.type	journal article	es_ES
dc.date.updated	2015-05-12T10:53:29Z
dc.identifier.doi	10.1016/j.physletb.2004.05.011
dc.identifier.idgrec	018688
dc.rights.accessRights	open access	es_ES